The Hills: New Beginnings star, 32, announced the news on Instagram Thursday, posting a silhouette photo of herself and boyfriend Kristopher Brock.
The reality star was previously married to The Hills co-star Brody Jenner, but the pair “decided to amicably separate” in August 2019, just one year after their Indonesian wedding.
Shortly after their split was confirmed, Carter had a brief fling with Miley Cyrus that ended in September 2019.